Duplex steam-pump.



No. 654,9l8. Patented .luly 3|. I900. H. L. PERRINE. DUPLEX STEAM PUMP.

(Application filed. Nov. 16, 1899.) (No Model.) 3 Sheets-Sheet I.

we a WW I A NVENTOI? I A o/swErs W/ TNESSES N0. 654,9l8. Patented July 3|, I900. H. L. PERRINE.

DUPLEX STEAM PUIIP.

(Application filgd Nov. 16, 1899.)

3 Sheets-sheaf 2.

(No Modal.)

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No. 654,9l8. Patented July 3|, I900.

H. L. PERRINE.

DUPLEX STEAM PUIIP.

A ucacimi filed mw. 16, 1899.)

WITNESSES THE mums versus an. PHOTO-LUNG wAsMmaron. u. c.

UNITED STAT-EDS:

I PATENT OFFICE...

HARMANUS LANSING PERRINE, OF MILWAUKEE, WISCONSIN.

j DUPLEX STEAM-PUMP.

srncrrrca'rrou forming part or Lfet ters lfatent No. 654,918, dated duly 31, 1906.

Application filed November 16,1899. Serial No. 7371214. (No m'd clel.)

To all whom it may concern: H Be it knownthat I,--HARMANUS LANSING PERRINE, a citizen of the United States, re siding at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invent ed certain new and useful Improvements in Vertical Steam Ends for Twin Airand Water gumps, of which the following is a specificaion. The invention herein relates to improvements in vertical duplex steam ends, wherein two high-pressure or simple steam-cylinders of equal diameter andstroke are employed with a working beam; and my said improvements consist of certain combinations of parts in which the workingbeam, valve-gear, and slide valves cooperate for controlling two steam-pistons of a duplex steam end in a way and by a novel combination when applied to drive a pair of vertical pumps,- more particu-' larly vertical air-pumps, in connection with a condensing apparatus, either of the surface or jet type. The object 'of my new combination is' to work two high-pressure steam-cylinders with a single valve comprising two Dvalves in one rigidly connected and in line and in such manner that the two pistons are caused to travel in opposite directions,crossing' in the center of the stroke, the uniform move'ment of each being maintained through the work ingbeam.

1n the drawings which embody my improvement, Figure 1 shows in.frontelevation a pair of simple steam-cylinders, valve-gear, and Work-beam, as maybe applied'to a vertical twin pump in which the valve mechanism is operated and controlledfrom the work-beam in accordance with my improvement. Fig. 2 shows an end view of the compound levers forming apart of the valvegear. Fig. 3 is a vertical cross-section of the port-casting, taken on the line a: w of Fig. 5, showing the steam-chest, the auxiliary cylinder, slide-valve, comprisingtwo D-valves in one 'rigidly'connected inline, and exhaustport for No-2 cylinder. Fig. 4 is an enlarged elevation of the steam-cylinders, the chestcover being removed to expose the valveseat, and the ports seen in dotted lines for cylinder No. 1, while thedouble D slide and auxiliary valves and yoke, together with the reversing-piston and its cylinder, are seen partially in section and partially in elevation. Fig. 5 is a plan view of Fig. 4 with the portcasting partially in horizontal section, showing the steam and exhaust ports for'cylinder No. 2 and in'dott'ed linesfor cylinder No. 1.

Fig. 6 is a front elevation of a pair of cylinders fitted with difierential or trunk pistons, the steam-chest removed to expose in the valve-seat the steam and exhaust ports for each cylinder, together with the steam-sup ply port, and in which the cylinders and ports are in one casting; and Fig. 7 is a plan view of Fig. 6, showing the steam and exhaust ports of No. 2 cylinder in section and the position of the double D slide-valve at the point of reversal of the stroke.

As shown, the two steame cylinders are faced and bolted to athree-faced casting or distance-piece 15 in order to accommodate steam-cylinders of different sizes, Figs. 3, 4, and 5. On the third face is located the steam-chest andreversing-cylinder, with the main double D slide and auxiliary'valves. These valves and the reversing-piston have a horizontal movement at right angles to the travel of the main pistons through the connections and compound levers shown in Figs.

1, 2, and 3. j I employ a double D slide-valve, both valve parts rigidly connected in line and covering two common three ported valveseats, so that each steam-cylinder has its own steam-ports, the exhaust from each merging into one common opening to the atmosphere or condenser. The'main double D slide-valve l'in thesefigures is seen as having been moved to line 'andline by direct connection from the beam 2-throughthe crank-arm 3, the link 4, the lever 5, and the valve-rod 7, and link 6, as seen Iin' Fig-'1. The inverted auxiliary slide-valve 8, having a slight lead, has uncovere'd'the port 9, Fig. 4, admitting live steam behind the chest or reversing piston 10, which is driven to the left, pullingthrough the rods 11 12-thelever 13; which carries the rock-shaft 14, the lever 5, link 6, and the valve-rod 7, which engages the double D slide-valve and moves it across the steamport 16, admitting steam under the main piston No. 2 for the upstroke, and port 17 for the downstroke oftthe main piston No. 1, exhausting to atmosphere or condenser through ports IOO the-steam-chest, double D slide-valve, and;

face. of the port-casting.

18 and-19, and out into the exhaust-passages 2O 20 into a common. exhaust 21.. Live steam is admitted at 22, Fig. 5. Thus the action is reversed at the end of each stroke, as it will be seen that acontinuous and coincident movement with the main pistons is effected through the levers, whereby the auxiliary;

valve 8, carried on the valve-yoke 23, has a constant travel, controlling the reversing-pistravel by the reversing-piston through the lever-'13, which carries the lever 5 and rock- 1 shaft 14. I I In Figs. 6. and 7 I have shown the application of the double D slide-valve as applied to a pair of differential or trunk pistons, live steam being used only for the upstrokeof each piston and expanded fromunder toupper side of each'piston alternately. In this arrangement the steam-ports for each cylinside of No.2 is exhausting through port26to condenser and'the steam under piston No. 1 is expanding to upper side through port 27. This action is reversed by the gearing above described. (See Fig. 7.) v r In Fig. 3-1 have shown a section through the exhaust-passages 2 0 and 21 in the portcasting, and in this figure is seen that the main slide D -valve has a beveled bearing 28 on the bottom-side of the chest, so as-to. in.- sureits seating against the vertical seat or By placing the steam-chest with the roversing-pist-on and the-double D slide-valvein a; horizontal position l am enabled to control the separate admission andexhaust from two cylinders by practically one valve and at the same time insure its seating and. provide a bearingfor its: support (instead of a balane' ing-plate, as when the valve is placed vvertical) and am enabled to provlde a support on the-platform orentablature for the'compound lever valve-gear at a point where-it is least liableto damage or disarrangemont, render ingthe parts-easilyaccessible and adjustable andin-full view of the attendant; or I haved-escribed and, shown the port-casting as a third element or part when fitted to and uniting;two-steam-cylinders side by side,

which'will be the form-of construction when difi erentrsized cyli-ndersare used with one size of valvegear and chest. It; may be-desi-rable, however, in making standard patterns with fixed centers to mold the two steamcylinders andtheir ports and valveseat all in one casting, as shownin Figs. Grand 71;

. pistons. ton, while the main double D slide-valve has an intermittent movement twice the width-of 4 the ports and is brought to line and line by, direct action of the main pistons and is 'carried across the ports half of its maximum" short end connects It will be noticed that the ported casting while connecting the two steam-cylinders forms a face for the steam-chest, a beveled seat for the double D-valve inclining so as to cause the valve to maintain its joint and to support the valve in vertical position, and that the movement of said valve upon its seat is at right angles to the movements of the It will also be seen that the cylin- -ders are connected to the ported casting, so that a center linedrawn through said casting. will intersect the centers lengthwise of the vertical cylinders.

The arrangement of the compound gear gives the advantage of supporting it upon a single bracket fixed on the end-of the frame, and this bracket forms the pivot-bearing for the lever, which. stands upward, whil'ernedi ately ofthe cylinders and below the frameentablature is mounted the working beam, which is connected to the lower end 'of the hanging lever, which is fnlerumed on the upward-standing lever above its bracket-pivot-, while above said fulcrum the lever by its with the double; D slidevalve rod. Iclaim--- 1. In a duplex pu mping-en-gi-neand in combination with two simple or-high-pressure steam --cylinders and their pistons-having equal diameter and stroke, eachcylinder-having its own three-portedcsea't, a portedcasti-ng betweenand joining saidcylinders'with ported faces in communication-therewith, a steam-chest -onthe third ported-face, a-reversing-piston in saidchest', a slide =*valve comprising two D-valves inonerigidly-con .nected in line and a cavity in each valve ,p'art forv each three-ported seat and having'a movement at right angles-with thortravel of the pistons, the auxiliary'slide-valve andm'eclv anis-mconnecting the double- Dwalve, the auxil-iaryslidewalve and the reversing-pisf ten for operation as described.

1 2. 1 In a duplex'pu'mping-engine and incom bination with two steam-cylinders1 and their jpistons having equal diameter and-stroke, each cylinder having its .own' three-ported -valve-seat,;a casting between andrjoining said cylinders with ported faces-in communication therewith, of a shde-valvecom prismg two D'- 'valves in one rigidly connectedinvlinefand having; a cavity; in each valve part for each .3 three-portedseat and havingamovement at right angleswi-th the travel of thefpistons, 1 the auxiliary slide-valve the reversing-pistonand the'compound levers connecting therdonble D"-valve and the reversing-piston for op oration in theway described; T. 3. Inaduplexrpumping engineand incombination with twosteamecylinders'and their pistons, each cylinder having "its. own threw g porte d seat, a casting between and joining said cylinderswi-th ported faces in, communi- D-valv'es in. one/rigidly connectedin line ration-therewith, of aslide valve'comprising and a cavity in each valve part for each threeported seat standing vertical supported upon an inward-beveled seat and having a movement at right angles with the travel of the pistons, the auxiliary slide-valve, the reversing-piston and the compound levers connecting the double D-valve and the reversingpiston.

4. In a duplex pumping-engine the combination of two vertical trunk or differential steam-cylinders and their pistons a working beam connecting said pistons a ported cast: ing between and in communication with said cylinder three-ported valve-seats thereon one for each cylinder, a double D slide-valve each valve part rigidly connected in line and covering both three-ported valve-seats having a separate cavity for each valve'seat, a steamchest and the auxiliary slide-valve, with a reversingpiston and mechanism connecting said reversing-piston, the double D slidereversing-piston, the double D-valve and the auxiliary slide-valve for operation as described.

In testimony whereof I aflix my signature in presence of two witnesses.

HARMANUS LANSING PERR-INI Witnesses:

A. E. H. JOHNSON, A. ROLAND JoHNsoN. 

